the white house is very concerned about the use of chemical weapons against rebels and civilians. but equally concerned that the weapons may fall in hands of extremist groups fighting alongside with the rebels. president obama on friday essentially reduced expectations that the united states would intervene in syria anytime soon. american officials fear that as bad as assad may be and as bad as the violence may be now, what comes after he is removed may be more chaotic and violent. as the debate continues, the rebels attack a government air base in the province today, while the syrian forces repeatedly shelled rebel positions in and around the province of aleppo. shannon? with the latest from the middle east. thank you. >>> distributors of videos circulating on the web claim it shows proof syrian government is guilty of attacking the own citizen with the kim call weapons. just last week they admitted the likelihood that syria used small amount of chemical weapons and president obama said if syria does that, there will be consequences. senator jim rich on the intelligence and forei